CWE
119 416
Advisory Published
Advisory Published

RHSA-2022:5099: Important: grub2, mokutil, shim, and shim-unsigned-x64 security update

First published: Thu Jun 16 2022(Updated: )

The grub2 packages provide version 2 of the Grand Unified Boot Loader (GRUB), a highly configurable and customizable boot loader with modular architecture. The packages support a variety of kernel formats, file systems, computer architectures, and hardware devices.<br>The shim package contains a first-stage UEFI boot loader that handles chaining to a trusted full boot loader under secure boot environments.<br>Security Fix(es):<br><li> grub2: Integer underflow in grub_net_recv_ip4_packets (CVE-2022-28733)</li> <li> grub2: Crafted PNG grayscale images may lead to out-of-bounds write in heap (CVE-2021-3695)</li> <li> grub2: Crafted PNG image may lead to out-of-bound write during huffman table handling (CVE-2021-3696)</li> <li> grub2: Crafted JPEG image can lead to buffer underflow write in the heap (CVE-2021-3697)</li> <li> grub2: Out-of-bound write when handling split HTTP headers (CVE-2022-28734)</li> <li> grub2: shim_lock verifier allows non-kernel files to be loaded (CVE-2022-28735)</li> <li> grub2: use-after-free in grub_cmd_chainloader() (CVE-2022-28736)</li> <li> shim: Buffer overflow when loading crafted EFI images (CVE-2022-28737)</li> For more details about the security issue(s), including the impact, a CVSS score, acknowledgments, and other related information, refer to the CVE page(s) listed in the References section.

Affected SoftwareAffected VersionHow to fix
redhat/grub2<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/mokutil<0.4.0-8.el9_0.1
0.4.0-8.el9_0.1
redhat/shim<15.6-1.el9
15.6-1.el9
redhat/grub2-common<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-debugsource<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-efi-aa64-modules<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-efi-x64<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-efi-x64-cdboot<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-efi-x64-modules<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-emu-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-pc<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-pc-modules<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-efi<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-efi-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-extra<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-extra-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-minimal<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-minimal-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/mokutil<0.4.0-8.el9_0.1
0.4.0-8.el9_0.1
redhat/mokutil-debuginfo<0.4.0-8.el9_0.1
0.4.0-8.el9_0.1
redhat/mokutil-debugsource<0.4.0-8.el9_0.1
0.4.0-8.el9_0.1
redhat/shim-x64<15.6-1.el9
15.6-1.el9
redhat/grub2-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-debugsource<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-ppc64le<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-ppc64le-modules<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-extra<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-extra-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-minimal<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-tools-minimal-debuginfo<2.06-27.el9_0.7
2.06-27.el9_0.7
redhat/grub2-debuginfo<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-debugsource<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-efi-aa64<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-efi-aa64-cdboot<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-emu-debuginfo<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-tools<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-tools-debuginfo<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-tools-extra<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-tools-extra-debuginfo<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-tools-minimal<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/grub2-tools-minimal-debuginfo<2.06-27.el9_0.7.aa
2.06-27.el9_0.7.aa
redhat/mokutil<0.4.0-8.el9_0.1.aa
0.4.0-8.el9_0.1.aa
redhat/mokutil-debuginfo<0.4.0-8.el9_0.1.aa
0.4.0-8.el9_0.1.aa
redhat/mokutil-debugsource<0.4.0-8.el9_0.1.aa
0.4.0-8.el9_0.1.aa
redhat/shim-aa64<15.6-1.el9.aa
15.6-1.el9.aa
redhat/shim-unsigned-x64<15.6-1.el9
15.6-1.el9
redhat/shim-unsigned-x64<15.6-1.el9
15.6-1.el9

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Frequently Asked Questions

  • What is the severity of RHSA-2022:5099?

    The severity of RHSA-2022:5099 is classified as important.

  • How do I fix RHSA-2022:5099?

    To fix RHSA-2022:5099, update the affected grub2, mokutil, and shim packages to the specified versions provided in the advisory.

  • Which packages are affected by RHSA-2022:5099?

    Affected packages include grub2, grub2-common, mokutil, and shim with specific version constraints.

  • What vulnerabilities does RHSA-2022:5099 address?

    RHSA-2022:5099 addresses various vulnerabilities related to the GRUB boot loader which could potentially allow unauthorized access or system compromise.

  • Is there a workaround for RHSA-2022:5099?

    Officially, no workaround is provided for RHSA-2022:5099; applying the recommended updates is the advised solution.

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